Designed by jeweler Todd Daniels, the Ring Layout Mandrel helps you lay out rings more quickly and accurately. The circumference of the mandrel is divided into 36 segments of 10°. On the handle of the mandrel, inscribed markings indicate 0°, 90°, 180°, and 90°. The segments and markings allow you to divide a ring into quadrants for precise spacing when laying out stones, scrolls, design elements, or anything that requires accurate spacing. Tapers from 22 to 12.8 mm (0.87" to 0.50"). Steel construction, 10" long overall. Made in USA.